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NCHS used bridged-race intercensal population estimates to recalculate the vital rates for 1991-1999 which originally were calculated using 1990-based postcensal estimates.The bridged-race population estimates are used by NCHS to calculate birth and death rates for data year 2000 and later years, as well as to produce revised birth and death rates for the 1990s and 2000s.
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The bridging methodology is described in the report, “ Census 2000 Populations with Bridged Race Categories pdf icon ” which was published in September 2003 and is available for download from this site. The bridged-race population estimates are produced under a collaborative arrangement with the U. Many data systems, such as vital statistics, are continuing to use the 1977 OMB standards during the transition to full implementation of the 1997 OMB standards. These estimates result from bridging the 31 race categories used in Census 2000 and Census 2010, as specified in the 1997 Office of Management and Budget (OMB) standards for the collection of data on race and ethnicity, to the four race categories specified in the 1977 OMB standards.
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The National Center for Health Statistics releases bridged-race population estimates of the resident population of the United States for use in calculating vital rates. More specifically, race bridging is a method used to make multiple-race and single-race data collection systems sufficiently comparable to permit estimation and analysis of race-specific statistics. Race bridging refers to making data collected using one set of race categories consistent with data collected using a different set of race categories, to permit estimation and comparison of race-specific statistics at a point in time or over time. Interactive Databases and Related Resources.
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Release of Bridged-Race Population Estimates.Downloadable Data Files and Documentation.Geographic Codes in the Bridged-Race Population Files.Changes in Census Bureau Estimates Methodology.